29 lines
579 B
Text
29 lines
579 B
Text
import Lean.Meta.Tactic
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import Lean.Meta.Sym
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def f (x : Nat) :=
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let y := x + 1
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2*y
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open Lean Meta Sym
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/--
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info: x : Nat
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⊢ have y := x + 1;
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x ≤ 2 * y
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---
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info: x : Nat
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y : Nat := x + 1
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⊢ x ≤ 2 * y
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-/
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#guard_msgs in
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run_meta SymM.run' do
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withLocalDeclD `x Nat.mkType fun x => do
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let m ← mkFreshExprMVar <| mkNatLE x (mkApp (mkConst ``f) x)
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let mvarId := m.mvarId!
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let mvarId ← unfoldTarget mvarId ``f
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let mvarId ← mvarId.liftLets
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let goal ← mkGoal mvarId
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logInfo goal.mvarId
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let (_, goal) ← intro goal `y
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logInfo goal.mvarId
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return ()
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